Motor support



Dec. v10, 1935. w. J. coPPocK MOTOR SUPPORT Filed Feb. 2l, 1954 4Sheets-Sheet l i l f g1 ATTORNEYS.

Dec. 10, 1935. w. J. coPPcK 2,024,127

MOTOR SUPPORT Filed Feb. 21, 1954 4 sheets-sheet 2' Qn/g KQ @WJ Dec. 10,1935. w. J. coPFocKv MOTOR SUPPORT 4 Sheets-Sheet 5.

' INVENTOR:

mimi 8%?? A Filed Feb. 21', 1934 lwdf,

Y TToRNEYs.

Dec. 1o, 1935. w J, COPPOCK 2,024,127

MOTOR SUPPORT Filed Feb. 2l, 1934 4 Sheets-Sheet 4 Wl TNESSES: I N V ENTOR:

@P By www Patented Dec. 10, 1935 UNITED STATES PnJrlezlv'r OFFICE MQTOR`SUPPORT Application February 21, 1934, Serial No. 712,437

9 Claims.

This invention relates to motor supports of the type wherein the motoris pivotally mounted in such a manner that its weight may be utilized toyieldingly maintain the drive belt taut against slippage under load.

The chief aim of my invention is to obviate unnecessary weight andbulkiness in motor supports of the kind referred to, by making possibletheir economical construction from sheet and wrought metal partswithout, sacrifice of the necessary strength or operative eiiiciency. Itis a further object of my invention to provide for easy relativeadjustment of the parts such that any desired degree of tension may beyieldingly maintained on the driving belt under the Weight of the motor.

Another 'object of my invention is .to insure against binding of thepivot bearings on which the motor swings, under torsional strains andheavy Still other objects and attendant advantages will be manifest fromthe detailed description following of the attached drawings, whereinFig. I is a view in side elevation of a motor support convenientlyembodying my invention.

Fig. II shows the support in top plan with the motor removed.

Fig. III is an endfelevation of the support with portions thereof brokenaway and sectioned for better disclosure of important details.

Fig. IV is a fragmentary longitudinal detail section taken as indicatedby the arrows IV--IV in Figs. II and III.

Fig. V is a detail section taken as indicated by the arrows V--V inFigs. II and III; and

Fig. VI is a perspective View showing avmodified detail of my invention.i

As herein shown, my improved motor support comprises a base member Iwith a rectangular bottom plate 2 'of heavy gauge sheet metal, hav-` ingsustaining pads 3 of like material separately attached to its undersideat the corners as by Welding. Upstanding from the base I immediatelyinward of its opposite side edges 4 are standards 5, each of which isalso vfashioned from stout sheet metal with side web portions 6, footportions 1 and lateral bracing webs 8 likewise permanently unitedpreferably by welding. From Fig. II it will be observed that the footportions 1 f of the standards 5 are longitudinally slotted as at 9 andI0 for passage of headed screw clamp bolts Il and I2 which engage inapertures I3 and I4 in the plate 2 of the base I. By reason of theprovisions just described, the standards are shiftable in the directionof the side edges 4 of the base I; and in order to facilitate suchshifting, I have provided adjusting screws Il. A1 shown, each of theseadjusting screws I5 is rotatively supported in a post I6 upstanding fromthe base I, but prevented from shifting axially 5 through engagement of`its head I1 with one side of the post, and through engagement of apinned collar I8 on its threaded shank with the opposite side of saidpost. Recessed into the side web 6 of each standard 5 is a clevis pieceI9 whereof 10 the ears are pierced for free passage of the shank of theadjusting screw bolt I5; and held against rotation between the ears ofthe clevis piece is` a nut 20 which is engaged by the threads of thebolt. Near the top, the side web 6 oi each stand- 15 ard 5 has aspherically ground aperture 2 I, which, inconjunction with acomplemental aperture 22 in a plate 23 attached -to the web 6 at theinnerv side thereof by rivets 24, forms a socket for a spherical bearingmember 25.

Pivotally suspended from the standards 5 is an' underslung frame whichis comprehensively designated by the numeral 26, and which serves tosupportthe motor 21 in such manner that the weight ofthe latter may beutilized in maintain- 25 ing the belt 28 taut and under tension toprevent slippage thereof relative to the driving pulley. As' shown, themotor supporting frame 26 is a generally U-shaped structure, consistingof a platform with upstanding side or end pieces that are 30 separatelypivoted to the standards 5, 5, leaving the space between the side piecessubstantially free and clear. Constructionally, the motor mounting orsupport 26 includes a U-shaped hanger element 29, and a pair of arms 30yand 3| 35 which are mounted in laterally spaced relation on said hangerelement and serve as the motor platform. From Figs. l1 and III it willbe observed that the hanger element 29 is made in two parts which arefashioned to right angle configuration 40 from square section bar metal,with horizontal shanks 29a constituting cross means for interconnectingthe vertical extremities 29h, whichlatter constitute the lend or sidepieces of the hanger 29 and of the frame structure 26, and are formed 45with pivot trunnions 29e for engaging the axial apertures of thespherical bearing members 25. 'Ihe arms 30 and 3| on the other handare'formed to channel or angle section from stout sheet metal andprovided vin their side iianges with square 50 apertures for penetrationby the horizontal shanks 29a of the two components of the hanger element29. In assembling, after the arms'30 and 3l have been slipped into placeover the Shanks 29a of the hanger components, the contiguous 55horizontal webs of the arms 30 and 3|, it will be noted from Fig. II,are respectively slotted longitudinalbr as at 34 for passage of thebolts 35 usedin securing the motor 21. As a consequence of thisarrangement, the motor 21 may be shifted along the arms 30 and 3| forchange of leverage relative to the pivot of the underslung supportingframe 26. As here shown, the motor 21 can be adjusted through a rangeincluding positions more or less between the side pieces 29a, 29a andthe trunnions 23h, 29h. In order to prevent rotation of the securingbolts 35 incident to tightening or loosening the nuts 36 associated withthem, longitudinally-extending angle pieces 31 are arranged within thehollows of the arms 30 and 3| to engage the sides of the square heads 38of the said bolts. The angle pieces 31 just referred to are permanentlysecured to angle strips 39 which are in turn permanently secured to theinner vertical flanges of the arms by welding or otherwise.

Beneath and in line with the horizontal portion of the hanger element29, the side anges of the arm 30 are connected by a plate 40 which is.centrally pierced and tappedv for a set screw 4|, see Figs. DI and IV.The hanger is thus adaptable to motors of different widths. The motor isfirst secured to the arms 30 and 3| by the bolts 35, and, after locationof said arms laterally of the hanger frame 26, the set screw 4| istightened up to rmly engage the hanger element 29.

Downward swinging movement of the motor 21 is limited by a stop bar 42along the left hand edge (Figs. I and II) of the base plate 20, saidstop bar being secured to the plate by screw bolts 43 whereof the nuts44 are recessed in countersunk holes 45 in thetop face of the bar.Upward swing of the motor 21 is on the other hand limited by screw bolts46 which. are secured to the standard 5 and adapted to intercept thevertical extremities 29h of the hanger element 29.

Fig. VI shows a slight modiflcationof my invention wherein the verticalextremities 28h', 23h" of the hanger 29' are made separate and connectedby a pair of laterally spaced rods 28a. At one end, the rods 29a arepermanently anchored in the bosses 41 of the hanger piece 29h which, atthe other end, said'rods are detachably secured by crossv pins 33 in thebosses 48 of the other hanger piece 29h". In this case the arms 30' and3| of the motor mounting frame Y26' have their vertical flanges piercedfor passage of the rods 29a.` The motor mounting frame 26' is assembledby sliding the arms 30' and 3| onto the rods 29a', whereupon the hangerpiece 29h" is applied to the freeends of said rods andmade 4fast bythe'cross pins 33' in a manner which is readily understandable from Fig.VI. f

From the foregoing it is evident that I have provided a motorpsupportwhich can be very economically fabricated from stock materials, which iseasily assembled, and which, notwithstanding construction for the mostpart fromy comparatively light sheet metal, is strong and sturdy forcapacity to withstand hard usage. The underslung design of the motormounting frame e 26 not only favors compactness in the organizain anyway affecting the positional adjustment of the motor for balance. Itwill furthermore be evident that through provision of self-aligningspherical bearings for the hanger element 29, the support is renderedimmune against the possibility 6 of binding under strains induced bytorsion under load, or through slight disalignment of the pivots due toinexact relative adjustment of the bearing standards on the base I.`

Having thus described my invention, I claim: l0

1. In a motor support of the character described, the combination of abase plate with laterally lspaced standards upstanding therefrom; anunderslung swinging motor mounting between said standards comprising aU-shaped structure including a motor platform and upstanding side piecesat its sides separately pivoted to the standards, leaving the spacebetween said side pieces substantially free and clear; and means forsecuring the motor to said platform with capacity for adjustmentrelative to the swinging axis, through a range including positionsbetween the side piece pivot axes. n

2. In a motor support of the character described, the combination of abase plate with laterally spaced standards adjustable along said baseplate; an underslung swinging motor mounting between said standardscomprising a U- shaped hanger with end or side pieces separately pivotedto the standards, cross means below the pivot axes interconnecting saidside pieces, and a motor platform attached to said cross means; andmeans for securing the motor to said platform with capacityv foradjustment relative to the swinging axis, through a range includingposi- 85 tions between the side piece pivot axes.

. 3. In a moton support of the character described, a base plate;laterally spaced standards independently adjustable along said baseplate; an underslung swinging motor mounting composed of a pair of sidepieces with trunnions engaged in self-aligning bearings sustained by thestandards, cross means below said trunnions detachably interconnectingsaid side pieces, a number of laterally-spaced arms apertured forpassage of said cross means; and means for securing the motor to saidarms with capacity for adjustment relative to the swinging'axis, througha range including positions between said trunnions.

4. In a motor support of the character de- 50 scribed, -a base plate;spaced standards upstanding from said base plate; and a swingingunderslung motor mounting having a transverse U- shaped axis member withtrunnion ends journalled in self-aligning bearings sustained by saidstandards. a number of arms laterally spaced on the cross 'oar of saidU-shaped axis member, and means for securing the motor'to the arms withcapacity for positional adjustment relative to the swinging axis througha range including positions between said trunnion ends.

5. In a motor support of the character described, a base plate;laterally spaced standards independently adjustable along said baseplate; and a swinging motor mounting including a transverse squaresection axis member with end trunnions engaged in self-aligning bearingssustained bythe standards, a number of channel section sheet metal armswith square apertures in their side flanges for passage of the axismember, and 7o means for securing the motor to the arms with capacityfor positional adjustment relative to the swinging axis.

6. In a motor support of the character described. a base plate;laterally spaced standards independently adjustable along said baseplate; and an underslung motor mounting including a hanger elementcomposed of two parts with vertical extremities terminating in trunnionsto en gage self-aligning bearings carried by the standards and withsquare section shanks, an aligning sleeve connecting the contiguous endsof said Shanks, a number of arms with square transverse apertures forpassage of the Shanks of the hanger element components, and means forsecuring the motor to said arms with capacity for adjustment relative tothe swinging axis.

'7. In a motor support of the character described, a base plate;laterally spaced standards independently adjustable along said baseplate; and a swinging motor mounting including a transverse squaresection axis member with trunnions engaged in self-aligning bearingssustained by the standards, a number of channel section sheet metalarmswith square apertures in their side flanges for pasage of the axismember and longitudinal slots in their cross webs; and square headedsecuring bolts for the motor engaging through the slots in the arms andheld from rotation by contact of their square heads with angle sectionpieces longitudinally within the hollows of said arms.

8. In a motor support of the character described, a base plate;laterally spaced standards independently adjustable along said baseplate; an underslung swinging motor mounting composed of a pair of endpieces with trunnions engaged in self-aligning bearings sustained by thestandards, a pair of spaced parallel cross rods detachably connectingsaid end pieces, a number of laterally-spaced arms with transverseapertures for passage of the rods; and means for securing the motor tosaid arms with capacity for adjustment relative to the swinging axis.

9. In a motor support of the character described, a. base plate;laterally spaced standards independently adjustable along said baseplate; and an underslung swinging motor mounting including a pair ofside pieces with trunnions in engagement with self-aligning bearingscarried by the standards, a pair of laterally spaced cross rodsdetachably connecting said end pieces, a 20 WALTER J. COPPOCK.

